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Consolidated Statements of Cash Flows - USD ($)
 12 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2014
Cash Flows From Operating Activities      
Net income attributable to the Company $ 24,660,362 $ 4,991,857 $ 3,597,313
Adjustments to reconcile net income to net cash provided by operating activities:      
Depreciation, depletion and amortization 5,211,494 3,664,373 1,272,778
Impairments included in restructuring charge 569,228 0 0
Stock-based compensation 1,750,209 943,653 1,352,322
Stock-based compensation related to restructuring 59,339 0 376,365
Accretion of discount on asset retirement obligations 49,054 34,866 41,626
Settlement of asset retirement obligations 0 (223,564) (315,952)
Deferred income taxes 575,235 1,422,489 1,344,812
Deferred rent 0 (17,145) (17,145)
(Gain) loss on derivative instruments, net (3,439,229) 109,974 0
Noncash (gain) on Delhi field litigation settlement (596,500) 0 0
Write-off of deferred loan costs 50,414 0 0
Changes in operating assets and liabilities:      
Receivables 484,285 (1,665,261) 507,592
Prepaid expenses and other current assets 24,754 378,049 (480,899)
Accounts payable and accrued expenses 822,730 551,452 663,645
Income taxes payable 431,818 190,032 (233,548)
Net cash provided by operating activities 30,653,193 10,380,775 8,108,909
Cash flows from investing activities      
Derivative settlements received 3,633,831 0 0
Proceeds from asset sales 0 398,242 542,347
Development of oil and natural gas properties (21,095,901) (4,890,909) (966,931)
Acquisitions of oil and natural gas properties 0 0 (59,315)
Capital expenditures for technology and other equipment (6,883) (313,059) (312,890)
Maturities of certificates of deposit 0 0 250,000
Other assets (161,345) (236,559) (202,017)
Net cash used by investing activities (17,630,298) (5,042,285) (748,806)
Cash flows from financing activities      
Proceeds from the exercise of stock options 51,000 141,600 3,252,801
Acquisitions of treasury stock (1,357,185) (333,841) (1,655,251)
Common stock dividends paid (6,565,823) (9,833,642) (9,723,833)
Preferred stock dividends paid (674,302) (674,302) (674,302)
Deferred loan costs (168,972) (94,075) (63,535)
Tax benefits related to stock-based compensation 9,650,657 1,633,946 509,096
Other 33 67 6,850
Net cash provided (used) by financing activities 935,408 (9,160,247) (8,348,174)
Net increase (decrease) in cash and cash equivalents 13,958,303 (3,821,757) (988,071)
Cash and cash equivalents, beginning of year 20,118,757 23,940,514 24,928,585
Cash and cash equivalents, end of year $ 34,077,060 $ 20,118,757 $ 23,940,514